Changer for inking apparatus for printing-presses.



u.'7|7,|39. Patented nec. 3o, 19u52.y

J. THuMsoN.

CHANGER FOR INKING APPARATUS FDR PRINTING PRESSES.

(Application led Feb. 14, 1902. Bonewqd. Oct. 13, 1902.)

(Nn Moduli) NinD STTES JOHN THOMSON, OF BROOKLYN, NEV

PATNT OFFICE.

YORK, ASSIGNOR TO JOHN THOMSON PRESS COMPANY, OF JERSEY CITY, NEV JERSEY, AND NEW YORK, N. Y.,

A CORPORATION OF NEV JERSEY.

CHANGER FOR INKING APPARATUS FOR PRINTINGPPRESSES.

SPECIFICATION forming part of Letters Patent No. 717,139, dated December 30, 1902.

Application filed February I4, 1902. Renewed October 13, 1902. Serial No. 127,185. (No. model.)

T0 all whowt t nfl/ty concern:

Be it known that I, JOHN THOMSON, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Changers for Inking Apparatus for Printing-Presses, of which the following is a specification.

Myinvention relates to ink-distributing devices for printing-presses, and more particularly to the self-contained type of distributing-rollers known as changers; and it has for its object to improve the construction thereof with the view of obtaining greater durability, facility of manufacture, and ample lubrication; and to these ends the invention consists in a changer embodying the various features of construction and arrangement of parts, substantially as hereinafter more particularly set forth.

In the accompanying drawings, Figure l is a longitudinal section of a changer embodying my invention. Fig. 2 is an enlarged transverse section on the line 2 2, Fig. l; and-I `ig. 3 is an enlarged detail view, partly in section of the crescent and spindle.

It is well known to those skilled in the art that the changer of an inking apparatus isA subject to excessive wearof the parts, a'ndcon-` structions have been proposed for the purpose of improving the operation ofrsuch changers and overcoming the known difficulties to which their use is subject, and in my prior application, Serial No. 88,764, filed January 7, 1902, I have shown and claimed one means' of attaining these objects, and in my present construction I have provided other means for obtaining improved results.

Referring to the accompanying drawings, 5 represents a changer-sleeve,which is made in one piece and is provided with properbearings for the changer-shaft 4., which, as is well known, is usually secured tosome portion of the inking apparatus, and the sleeve rotates thereon and at the same time travels back and forth to a greater or less extent on the shaft to produce the well-known distributing eect of the ink. The shaft 4. in this instance is provided with a duplex .or cross screwthread 9, with which a switch or pivoted crescent Gengages to cause the reciprocation of the sleeve in awell-known way. It is desirable that the sleevebe integral, and when this is the case it is necessary to provide a construction by which the switch or crescent canV be secured in place and can be properly adj ustedin the screw-thread. In order to accomplish this in the presentinstance, I make the switch in two parts, one being the crescent-shaped portion Gand the other a bearing-spindle 7, and lthese are detachably connected togethen in someA` suitable way, preferably by providing thespindle 7 with an eX- tended screw-threaded portion 7, adapted to lit a corresponding screw-threaded opening in the body of the crescent portion 6. The sleeve 5 is provided with an opening 8a, through which the spindle 7 canbe introduced and secured to the crescent 6, and this openingis provided with a bearing 'for-the spindle shown in the form of a hollow screw 8, iitting the Opening 8fL and adjustabletherein.

As set forth in my former application above referred to, it is desirable inorder to secure copious lubrication of the crescent and the thread of the shaft to utilize vthe sleeve as an oil-reservoir, and in the present construction the sleeve is shown'as forming a chamber which is larger at its center and tapers to a reduced diameter atthe ends of the sleeve, so that when the oil-supplyis reduced it will tend to concentrate toward'the longitudinal center of the chamber. Inforder to aid in the distribution of the oil, thesleeve is provided with a rib or projection'lO, preferably arranged opposite the' opening 8, so that upon each rotation of the sleeve 5 the rib is more or less immersed in the oil: and acts practically'as a bucket to carry the oil up, so that it will drip from theV rib directly upon the screw-thread at a point substantially diametrically opposite the point of engagement of the crescent therewith, so thatthe screwthread will be progressively lubricated to insure the practically frictionless movement of the crescent therein. To prevent the oil in the chamber from escaping, as when handling the chamber or when it is at an angle or on its end, I provide tubular bushings 11 12, which are inserted in the ends of the sleeve and which preferably extend inward to a considerable distance,v forming closed pockets 13 at the ends of the sleeve from which the oil cannot escape, and these bushings also form extended bearings for the shaft 1l.

With this construction it will be seen that the parts can readily be assembled by placin g the crescent 6 in the'thread upon the shaft et and introducing the shaft through one of the bushings, as 1l, and then the spindle 7 is introduced through the opening 8a and secured to the crescent, when the hollow screw 8 of the spindle is applied and adjusted, and the sleeve forms a practically-closed chamber for the oil or lubricant, which of course can be introduced therein through the openings at the end or through the opening 8a for the hollow screw. When the changer is in position, the bulk of the oil or lubricant will tend to accumulate toward the central portion of the sleeve, and even when there is a relatively small quantity therein it will be concentrated to the position desired to be applied to the thread and crescent or switch.

What I claim isl. The combination with a changer-shaft havinga screw-thread, of a sleeve mounted thereon forming a chamber and carrying a switch engaging the screw-thread on the shaft, and a projection on the sleeve extending into the chamber adjacent the switch, substantially as described.

2. The combination with a changer-shaft having a screw-thread, of a sleeve mounted thereon forming a chamber and carrying a switch engaging the screw-thread on the shaft, the chamber being enlarged at or near its center and tapering toward the ends, and an inward projection arranged adjacent the switch, substantially as described.

3. The combination with a changer-shaft having a screw-thread, of a sleeve mounted thereon forming a chamber, a switch comprising a crescent and a separable spindle, and means for securing the switch to the sleeve, substantially as described.

4. The combination with a changer-shaft having a screw-thread, of a sleeve mounted thereon forming a chamber, a switch comprising a crescent and a separable spindle, and a hollow screw secured in the sleeve and forming a bearing for the switch, substantially as described.

5. A changer comprising a shaft having a screw-thread, a hollow sleeve having tubular bushings at its ends, a two-part switch, a hollow screw for the switch, and an internal projection arranged adjacent to the switch, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN THOMSON.

Witnesses:

C. E. DAVIDSON, HELEN M. BLANCHFIELD. 

